Treatment of cracked petroleum distillates



Patented Feb. 4, i936 STAS UNHTE NT QFECE TREATMENT or CRACKED ra'rnoLnDISTILLATES 1 No Drawing. Application June 10, 1933, Serial No. 675,297

8 Claims.

This invention relates to petroleum products manufacture, and moreparticularly motor fuels; and it is among the objects of the inventionto provide a treatment inhibitive of gum-formation which is notdiificult or critical to apply, and which is desirably dependable in theconditions .encounterable generally.

. To the accomplishment of the foregoing and related ends, theinvention, then, comprises the 10 features hereinafter fully described,and particularly pointed out in the claims, .the following descriptionsetting forth in detail certain em-' bodiments of the invention, thesebeing indicative however, of but a few of the various ways 'in which theprinciple of the invention may be employed.

In accordance with my invention, the cracked petroleum distillate issubjected to the action of a hydroxyquinoline. Representative of suchcom- 20 pounds for example, are 8-hydroxyquinollne, 2- hydroxyquinoline,G-hydroxyquinoline, 7-hydroxyquinoline; also tetrahydro-derivatives,such as 2 hydroxytetrahydroquinoline, 6 hydroxytetrahydroquinoline, 7hydroxytetrahydroquinoline, 25 8-hydroxytetrahydroquinline, etc. Theamount of the treating agent is small, less than 1 percent and ingeneral 0.004 to 0.5 per cent. The treating agent may be dissolveddirectly in the distillate to he treated, or where preferred may bedissolved in an organic solvent such as alcohol, benzol or the like, andsuch. solution may thenbe incorporated with the distillate.

As an illustrative example: 250 gr. of 8-hydroxyquinoline isincorporated in each 1000 gal- 35 ions of cracked gasoline, and isthoroughly disseminated.

As another example: 250 gr. of 2*hydr0xyquinoline is dissolved in asolvent, as alcohol, to make up substantially one gallon volume, and

this is mixed into each 1000 gallons of cracked gasoline to be treated.

Other modes of applying the principle of the invention may be employed,change being made as regards the details described, provided thefeatures stated in any of the following claims, or the equivalent ofsuch,-be employed.

I therefore particularly-point out and distinctly claim as myinvention:-

.1. A process of inhibiting gum-formation in cracked petroleumdistillates, which comprises subjecting such distillate to the action ofa small amount of an agent selected from the group consisting of8-hydroxy quinoline, Z-hydroxy quinoline, fi-hydroxy quinoline,'I-hydroxy quinoline, 2-hydroxy tetrahydroquinoline, G-hydroxytetrahydroquinoline, 7-hydroxy tetrahydroquinoline, 8-hydroxytetrahydroquinoline.

2. A process of inhibiting gum-formation in cracked petroleumdistillates, which comprises subjecting such distillate to the action ofa small amount of 8-hydroxyquinoline.

3. A process of inhibiting gum-formation in cracked petroleumdistillates, which comprises subjecting such distillate to the action ofa small amount of 2-hydroxyquinoline.

4. A processof inhibiting gum-formation in cracked petroleumdistillates, which comprises subjecting such distillate to the action ofa small amount of fi-hydroxyquinoline. c

5. A cracked petroleum motor fuel treated with a small amount ofan agentselected from the group consisting of B-hydroxy quinoline, Z-hydroxyquinoline, 6-hydroxy quinoline, 7-hydroxy quinoline, 2-hydroxytetrahydroquinoline, 6-hy- 'droxy. tetrahydroquinoline, '7-hydroxytetrahydroquinoline, 8'-hydroxy tetrahydroquinoline.

6. A cracked petroleum motor fuel treated with a small amount ofB-hydroxyquinoline.

' 7. A cracked petroleum motor fuel treated with a small amount of2-hydroxyquinoline.

8; A cracked petroleum motor fuel treated with a small amount ofG-hydroxyquinoline.

ELLIOTT B,v McCONNEIL.

